Koji (佐伯耕司) Saeki
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Born : 1972
Cat. M50 Ultrarunner since 2013
6
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
23
DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details
1
Countries visited ?Japan
Japan9,4%
Rank quotient ?This runner's calculation uses 6 eligible race(s): Σ(rank − 1) = 503; Σ finishers = 5 344. 503 / 5 344 × 100 = 9.41%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed6
Km — ultra races624 km
> 100 km2
Longest race118,0 km
34th Fuji 5 Lakes 118 km Challenge — 21/4/2024
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
HISTORY
6 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2024 | ||||
| 21.04 | 118km | 34th Fuji 5 Lakes 118 km Challenge |
12:27:57 h | 50 |
| 2023 | ||||
| 16.04 | 118km | 33th Fuji 5 Lakes 118 km Challenge |
13:36:54 h | 135 |
| 2016 | ||||
| 16.10 | 100km | 22nd River Shimanto 100km |
9:50:20 h | 136 |
| 2015 | ||||
| 20.09 | 100km | 15th Tango 100 km Ultramarathon |
9:41:01 h | 86 |
| 2014 | ||||
| 14.09 | 100km | 14th Tango 100 km Ultramarathon |
9:44:21 h | 92 |
| 2013 | ||||
| 29.09 | 88km | 16th Muraoka 88 km Ultra Marathon |
9:15:05 h | 10 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 21/4/2024 | 34th Fuji 5 Lakes 118 km Challenge | 118,00 | ×5 |
| ✓ 2 | 16/4/2023 | 33th Fuji 5 Lakes 118 km Challenge | 118,00 | ×5 |
| ✓ 3 | 16/10/2016 | 22nd River Shimanto 100km | 100,00 | ×4 |
| ✓ 4 | 20/9/2015 | 15th Tango 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 5 | 14/9/2014 | 14th Tango 100 km Ultramarathon | 100,00 | ×4 |
| ✓ 6 | 29/9/2013 | 16th Muraoka 88 km Ultra Marathon | 88,00 | ×3 |